Welcome to TASS, The Amateur Sky Survey

This project, aka TASS, is building astronomical cameras
and distributing them to
sites around the world;
our goal is to study bright objects across large sections of the
sky. Our first major project was
Mark III Survey of the Celestial Equator,
based on several Mark III cameras, like this one
at
the Johns Hopkins Applied Physics Lab:
The Mark III operated in drift-scanning mode, so it was limited to
areas near the celestial equator; in addition, it could not follow
targets of interest.
Nonetheless, we were able to compile a catalog of over 350,000
stars measured in at least two passbands;
you can
query our 'tenxcat' catalog.
The Mark IIIs also took some pretty pictures, like
this section of the Milky Way:

We are
now working on a bigger, better camera,
the Mark IV,
which is able to look away
from the celestial equator and follow objects for several hours.
The first one has
already been
delivered to Flagstaff,
where it has started a two-passband survey of the
northern sky and taken some pictures of its own.
Other Mark IV cameras have been acquiring images from Batavia, IL;
you can
query a database
of the Mark IV results.

If this is your first visit to the TASS site, you might want to read
some of the following: